I can't see that happening. If you look at availability at 60 days or less, there are a lot of orphaned nights that would go unused with a 3-4 night minimum stay. How many members have grabbed an open night at one resort in order to extend their stay? Or cobbled together a last-minute vacation with a couple of nights each at multiple resorts? Or booked a GV, Poly Bungalow or AKV CL for just one special night? The kind of restriction on point usage you're suggesting would leave a lot of unhappy members with unusable points and a lot of empty units scattered throughout DVC. And it might even be in violation of the contract (I'm not as savvy as some people are when it comes to the terms of the agreement, so I'll defer to them on this matter).